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Synthesis, Magnetic Properties, Magnetic Entropy and Arrot Plot of Antiferromagnetic Frustrated Er2Ti2O7 Compound |
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| Authors: | N. Ben Amor M. Bejar M. Hussein E. Dhahri M. A. Valente E. K. Hlil |
| Affiliation: | 1. Laboratoire de Physique Appliqu??e, Facult?? des Sciences de Sfax, Universit?? de Sfax, B.P. 1171, Sfax, 3000, Tunisia 2. Physics Department, Rabigh College of Science and Art, King Abdulaziz University, P.O. Box 344, Rabigh, 21911, Saudi Arabia 3. I3N and Physics Department, University of Aveiro, 3810-193, Aveiro, Portugal 4. Laboratoire de Cristallographie CNRS, D??partement MCMF, Institut N??el, B.P. 166, 38042, Grenoble Cedex 9, France |
| Abstract: | The pyrochlore $mathrm{Er}_{2}^{3 +} mathrm{Ti}_{2}^{4 +}mathrm{O}_{7}^{2 -}$ was synthesized via a ceramic method using two different oxides (Er2O3 and TiO2). The compound was found to crystallize in the cubic system with the $mathrm{Fd}overline{3}mathrm{m}$ space group (No. 227). A magnetic study, carried out at 2 and 300 K under an applied magnetic field ?? 0 H=0.05?T, has revealed a complex magnetic structure at low temperature. The effective paramagnetic moment $mu_{mathrm{eff}}^{exp}$ , deduced from (????? 0)?1=f(T) curve, was found by assuming a zero moment on the transition metal atom Ti4+. The paramagnetic Curie?CWeiss temperature ?? CW=?21.54?K, the nearest neighbor interaction J nn =?2.30?K, the classical nearest neighbor J cl=?8.65?K and the dipolar D nn =3.76?K interactions?? values have revealed an antiferromagnetic behavior for Er2Ti2O7 compound at low temperature. We have also studied the effects of the magnetic field splitting of rare-earth atom Er3+ in the compound Er2Ti2O7 curved Arrott plots. |
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